Serket Watch Co Reef X DivervsSeiko Prospex Sea 1968 Heritage Diver's GMT

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Serket Watch Co Reef X Diver at true scale

Reef X Diver

Seiko Prospex Sea 1968 Heritage Diver's GMT at true scale

Prospex Sea 1968 Heritage Diver's GMT

Diameter

43mm

42mm

Lug-to-Lug

50mm

48.6mm

lowest

Thickness

12.7mm

lowest

12.9mm

Water Resistance

200m

200m

Power Reserve

n/a

72h

MSRP

$499

lowest

$1,500

Movement

Seiko NH35

Seiko 6R54

Case

4 specs
Diameter
43mm
42mm
Thickness
12.7mm
12.9mm
Lug-to-Lug
50mm
48.6mm
Lug Width
22mm
20mm

Crystal & Dial

3 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Pink
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
Seiko 6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$499
$1,500
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Serket Watch Co Reef X Diver

Owners widely praise the Serket Watch Co Reef X Diver as an exceptional tool for diving, even when compared to significantly more expensive timepieces. Reviewers note its attractive aesthetics, highlighting pleasing details and a slim bezel design. Overall, owners rate the Serket Watch Co Reef X Diver highly for its functional excellence and appealing visual design at its price point.

Seiko Prospex Sea 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and value, with owners noting its comfortable wearability and attractive aesthetic, particularly the silver/white sunray dial and blue ceramic bezel. The improved bracelet clasp with excellent micro-adjustment is a recurring positive point. Some owners report accuracy figures of +3 seconds per day or +/- 5 seconds per day, exceeding the movement's stated range. However, the GMT functionality is considered secondary to its dive watch capabilities by some, with the GMT scale being difficult to read and the caller-style GMT movement being a drawback for certain users. The dial contrast is also noted as lacking by some, and the crown at 4 o'clock is undesirable for a few. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT highly for its blend of dive watch character and GMT functionality, offering significant features for its price.

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